Production of blockboard from small athel slats end-glued by different type of joint

Nazerian, Morteza; Moazami, Vahid; Farokhpayam, Saeedreza; gargari, rahim mohebi

doi:10.4067/s0718-221x2018005021101

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…Several techniques for bonding small pieces of solid wood and fabricating products with enhanced mechanical properties have been developed (Nairn, 2017;Nazerian at al., 2018). The lack of information on other commercial applications of large waste obtained in the production of engineered wood, aside from those mentioned above, makes it impossible to make an objective assessment of their complex recovery.…”

Section: Introduction 1 Uvodmentioning

confidence: 99%

Iskorištavanje borovine (Pinus sylvestris L.) s greškama za proizvodnju kompozitnog drva

et al. 2023

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This study presents opportunities for the utilization of timber by-products with defects for manufacturing engineered wood panels. Three gluing methods were proposed for this waste raw material derived from Scots pine (Pinus sylvestris L.) wood. The methods used for combining and gluing enabled a more complete and complex utilization of wood with defects. The physical properties (density and moisture content) and mechanical properties (bending strength and modulus of elasticity) of the laboratory-fabricated engineered wood panels were evaluated in accordance with the European standards. The highest density of 643 kg/m3 and bending strength values (28.6 N/mm2) were obtained from the panels manufactured using method 3 and veneered with beech veneer sheets. The modulus of elasticity of the laboratory-made engineered wood panels reached values of up to 5580 N/mm2. This study demonstrated the feasibility of the utilization of defective wood pieces in the manufacturing of engineered wood panels.

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Section: Introduction 1 Uvodmentioning

confidence: 99%

Iskorištavanje borovine (Pinus sylvestris L.) s greškama za proizvodnju kompozitnog drva

et al. 2023

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“…A part of the studies investigated new designs of the structures [6,10] and various raw materials for the core [11][12][13]. Other studies were oriented to the joint types used for the core stripes, to their lengths and their influence on the properties of blockboards [9,14,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Variable Conditions of Exposure on the Physical and Mechanical Properties of Blockboards

Zeleniuc

Coşereanu

2022

Applied Sciences

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The growing demand for wood and the continued increase of the raw material price have resulted in companies using more efficient wood resources in wood-based products such as blockboard. These boards are used in the field of interior design, especially. The aim of this research was to evaluate the effect of variable environmental conditions on the physical and mechanical properties of blockboard (BK). Two types of commercial BK were exposed in variable environmental conditions (kitchen, bathroom and climatic chamber) for three months. The BK structures were composed of veneer (V) and high-density fibreboards (HDF) for the face sheets and glued, solid wood, resinous strips for the core. The temperature and relative humidity of the air (RH) ranged from 18 °C to 25 °C and from 25% to 90%, respectively. In the climatic chamber (CC), the dynamics of the parameter variations were different than in the other two exposure climates, being determined by the programmed cyclic changes in RH. The changes observed on physical and mechanical properties were more extreme for the blockboards tested in the CC than in the kitchen (K) and bathroom (Ba). After 3 months of exposure in the CC, the thickness and weight of the boards increased by 1.8 and 1.1 times, respectively, for veneered BK, and by 4.4 and 0.4 times, for BK with HDF faces, compared to values recorded in the kitchen. The panels exposed in the CC exhibited the highest increase in moisture content (MC): 41% for veneered BK and 82% for BK with HDF faces after three months of exposure, followed by those exposed in the bathroom and kitchen. Increases in MC determined decreases of flexural properties and soundness surfaces, more evident for HDF face structures compared to V ones.

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“…As a kind of veneer wood-based panel, blockboard consists of veneers bonded to center layers and is widely used in furniture manufacturing and interior design because of its minimal glue consumption and low cost [1]. In order to increase the environmental protection of blockboard and reduce the waste of materials, Nazerian et al [2] and Teixeira et al [3] improved the center layers of the blockboard, but ignored the quality of the veneers on both sides of the center layers. In recent years, consumers have paid more attention to product appearance and the consistency of the surface texture, but during the growth and processing of wood different types of defects may appear, which will negatively affect the performance and ornamental value of the wood [4,5].…”

Section: Introductionmentioning

confidence: 99%

A Novel Image Inpainting Method Used for Veneer Defects Based on Region Normalization

Chen

Lou

et al. 2022

Sensors

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The quality of the veneer directly affects the quality and grade of a blockboard made of veneer. To improve the quality and utilization of a defective veneer, a novel deep generative model-based method is proposed, which can generate higher-quality inpainting results. A two-phase network is proposed to stabilize the network training process. Then, region normalization is introduced to solve the inconsistency problem between the mean and standard deviation, improve the convergence speed of the model, and prevent the model gradient from exploding. Finally, a hybrid dilated convolution module is proposed to reconstruct the missing areas of the panels, which alleviates the gridding problem by changing the dilation rate. Experiments on our dataset prove the effectiveness of the improved approach in image inpainting tasks. The results show that the PSNR of the improved method reaches 33.11 and the SSIM reaches 0.93, which are superior to other methods.

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Production of blockboard from small athel slats end-glued by different type of joint

Cited by 5 publications

References 12 publications

Iskorištavanje borovine (Pinus sylvestris L.) s greškama za proizvodnju kompozitnog drva

Iskorištavanje borovine (Pinus sylvestris L.) s greškama za proizvodnju kompozitnog drva

Effect of Variable Conditions of Exposure on the Physical and Mechanical Properties of Blockboards

A Novel Image Inpainting Method Used for Veneer Defects Based on Region Normalization

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